app: Add compile-tests script used by test script

Signed-off-by: René Dudfield <[email protected]>

Author: illume

app/package.json

@@ -21,7 +21,8 @@
     "package-msi": "npm run build && node windows/msi/build.js",
     "prod-deps": "mkdirp prod_deps && cd ./prod_deps && copyfiles -f ../package.json ../package-lock.json . && npm i --only=prod && cd .. && npx --no-install rimraf ./prod_deps/node_modules/.bin",
     "start": "node scripts/start.js",
-    "test": "jest"
+    "test": "npm run compile-tests && jest",
+    "compile-tests": "babel electron --out-dir electron/ --extensions .ts"
   },
   "build": {
     "appId": "com.microsoft.Headlamp",